circuits / deutsch-jozsa-2q

Deutsch-Jozsa (2 qubit)

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The simplest Deutsch-Jozsa algorithm on a 2-qubit oracle. Determines if a function is constant or balanced in one query.

quantumcomputer.dev
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Source Code

OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[1];
x q[1];
h q[0];
h q[1];
// Oracle (balanced)
cx q[0],q[1];
h q[0];
measure q[0] -> c[0];

Cite this circuit

MIT
quantumcomputer.dev. "Deutsch-Jozsa (2 qubit)". quantumcomputer.dev/circuits/deutsch-jozsa-2q. 2026.